Home price plunge is widespread

By Les Christie, staff writerDecember 28, 2010: 11:24 AM ET

NEW YORK (CNNMoney.com) -- Home prices took a shockingly steep plunge on a monthly basis, an indication that the housing market could be on the verge of -- if it's not already in -- a double-dip slump.

Prices in 20 key cities fell 1.3% in October from a month earlier, an annualized decline of 15%, according to the S&P/Case-Shiller index released Tuesday. Prices were down 0.8% from 12 months earlier.

Month-over-month prices dropped in all 20 metro areas covered by the index. Six markets reached their lowest levels since the housing bust first began in 2006 and 2007. They were Atlanta, Charlotte, N.C., Miami, Portland, Ore., Seattle and Tampa, Fla.

"The double-dip is almost here," said David Blitzer, chairman of the Index Committee at Standard & Poor's. "There is no good news in October's report. Home prices across the country continue to fall."

The report was far more dire than anticipated by industry experts, who had forecast an almost flat market in October. It followed weak September numbers.

"It was a bit of a surprise," said real estate analyst Pat Newport of IHS Global Research. "I wasn't expecting it to lag so badly in all 20 cities."

He, along with many other experts, has been forecasting further price erosion over the next few months of 5% to 7%, but didn't expect the price drop to hit so fast and so hard. It's mostly attributable to the end of the tax credit for homebuyers, the effects of which started to vanish beginning in June.

"The trends we have seen over the past few months have not changed," said Blitzer. "The tax incentives are over and the national economy remained lackluster in October, the month covered by these data."

Sales volume continues to lag, off 25% even from last October, when markets could hardly be described as robust.